Three numbers are chosen from 1 to 30 randomly. The probability that they are not consecutive is:
1/145
144/145
139/140
1/140
Additional Questions
|
A bag is full of 20 bananas and no other fruit. Rajeev draws a fruit from the bag. What is the probability that he will draw a banana? |
Answer |
|
An unbiased dice is rolled 5 times and the outcomes are 1, 2, 3, 4 and 5 respectively. If it is rolled again, what is the probability that the outcome is 6? |
Answer |
|
The probability of drawing an apple from a bag of fruits is 6/25. How many apples should Ravi draw, so that there is a chance he will draw 12 apples on average? |
Answer |
|
What is the probability for a day to be Sunday? |
Answer |
|
Rani has a bag with three blue and three yellow coins. She takes out a coin, sees its colour and puts it back in the bag. She does this thrice. What is the probability that she saw all blue coins. |
Answer |
|
Shikhar has a bag with 2 balls, each of which can be black or white with equal probability. Now, he draws out a ball and it turns out to be black. After this event, what is the probability that both balls are black? |
Answer |
|
A coin is tossed thrice. What is the probability that the first toss of coin lands head, second tail and third lands tail as well? |
Answer |
|
The probability of occurrence of event A is 0.3 and that of event B is 0.4. The events are independent. What is the probability of occurrence of both A and B? |
Answer |
|
The probability of occurrence of event A is 0.1 and that of event B is 0.2. The events are mutually exclusive. What is the probability of occurrence of both A and B? |
Answer |
|
The probability of occurrence of event X is 0.8 and that of event Y is 0.05. The events are mutually exclusive. What is the probability of occurrence of either X or Y? |
Answer |